Dina St. Clair

Dina St.Clair

Position Title

  • Department of Plant Sciences, College of Agricultural and Environmental Sciences
114 Asmundson Hall

Research Interests

Plant breeding and genetics; quantitative traits; genomics; abiotic stress tolerances; marker-assisted selection; pre-breeding; use of wild species in germplasm improvement.

Grad Group Affiliations

  • Horticulture and Agronomy Graduate Group
  • Integrative Genetics and Genomics
  • Plant Biology

Specialties / Focus

  • Molecular Biology, Biochemistry and Genomics
  • Plant Breeding
  • Quantitative and Population Genetics


  • PLS 154 Introduction to Plant Breeding, Winter

Field Sites

  • UCD Plant Sciences Field Facilities

Professional Societies

  • Crop Science Society of America
  • Genetics Society of America
  • AAAS


  • 1986 PhD University of Wisconsin-Madison


Arms E.M., Z. Yan and D.A. St.Clair. 2017. Differential transcriptional regulation in roots of tomato near-isogenic lines in response to rapid-onset water stress. Frontiers in Plant Science 8: 166. doi:10.3389/fpls.2017.00166

Arms E.M., J.K. Lounsbery, A.J. Bloom and D.A. St.Clair. 2016. Complex relationships among water use efficiency-related traits, yield and maturity in tomato lines subjected to deficit irrigation in the field. Crop Science 56: 1698-1710. doi:10.2135/cropsci2015.10.0661

Lounsbery, J., E.M. Arms, A.J. Bloom, and D.A. St.Clair. 2016. Quantitative trait loci for water stress tolerance traits localize on chromosome 9 of wild tomato. Crop Science 56: 1514-1525. doi:10.2135/cropsci2015.07.0432

Arms E.M., A.J. Bloom and D.A. St.Clair. 2015. High-resolution mapping of a major effect QTL from wild tomato Solanum habrochaites that influences water relations under root chilling. Theoretical and Applied Genetics 128: 1713-1724. doi: 10.1007/s00122-015-2540-y

Haggard J.E., E.B. Johnson and D.A. St.Clair. 2015. Multiple QTL for horticultural traits and quantitative resistance to Phytophthora infestans linked on chromosome 11 introgressed of wild tomato Solanum habrochaitesG3: Genes| Genomes| Genetics 5: 219-233

Haggard J.E. and D.A. St.Clair. 2015. Combining ability for Phytophthora infestans quantitative resistance from wild tomato.  Crop Science 55: 240-254. doi: 10.2135/cropsci2014.04.0286

Easlon H.M., D.A. St.Clair and A.J. Bloom. 2014. An introgression from wild tomato (Solanum habrochaites) affects tomato photosynthesis and water relations. Crop Science 54: 779-784. doi: 10.2135/cropsci2013.06.0401

Easlon H.M., J.S. Rubio Asensio, D.A. St.Clair and A.J. Bloom. 2013. Chilling-induced water stress: variation in shoot turgor maintenance among wild tomato species from diverse habitats. American Journal of Botany 100: 1991-1999

Haggard J.E., E.B. Johnson and D.A. St.Clair. 2013. Linkage relationships among multiple QTL for horticultural traits and late blight (P. infestans) resistance on chromosome 5 introgressed from wild tomato Solanum habrochaitesG3: Genes| Genomes| Genetics 3: 2131-2146

Johnson E.B., J.E. Haggard and D.A. St.Clair. 2012. Fractionation, stability, and isolate-specificity of QTL for resistance to Phytophthora infestans in cultivated tomato (Solanum lycopersicum).  G3: Genes| Genomes| Genetics 3: 1145-1159